When the little spoon is spooning the big spoon

being a big spoon while you're shorter than your little spoon

when a short man big spoons a tall woman

Engaging in man on man sexual encounters during your first stint in the slammer.

The legendary "Backpack Kid" dances with Katy Perry. He has no soul and moves like a robot, but he's actually an alien who comes from Proxima Centauri. He has the longest arm on the world and has the "Paty" Backpack, who gives him superpower. This backpack was made by the dance god "Shun Fik" in the Lear 1578.

We usually don't say the name of this living god because it could hypnotise you and make you dance so long until you die.

When you fuck a girl from behind who is taller than you so you have to sort of climb on her back like a backpack to fuck her. It's similar to doggy style

When your sexual partner is giving you a piggy back ride and you are giving it to him/her in the butt.